1 /* FreeBSD-specific methods for using the /proc file system.
3 Copyright 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
27 #include <sys/procfs.h>
28 #include <sys/types.h>
35 child_pid_to_exec_file (int pid
)
40 xasprintf (&path
, "/proc/%d/file", pid
);
41 buf
= xcalloc (MAXPATHLEN
, sizeof (char));
42 make_cleanup (xfree
, path
);
43 make_cleanup (xfree
, buf
);
45 if (readlink (path
, buf
, MAXPATHLEN
) > 0)
52 read_mapping (FILE *mapfile
, unsigned long *start
, unsigned long *end
,
55 /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */
57 int resident
, privateresident
;
61 /* As of FreeBSD 5.0-RELEASE, the layout is described in
62 /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a
63 new column was added to the procfs map. Therefore we can't use
64 fscanf since we need to support older releases too. */
65 if (fgets (buf
, sizeof buf
, mapfile
) != NULL
)
66 ret
= sscanf (buf
, "%lx %lx %d %d %lx %s", start
, end
,
67 &resident
, &privateresident
, &obj
, protection
);
69 return (ret
!= 0 && ret
!= EOF
);
73 fbsd_find_memory_regions (int (*func
) (CORE_ADDR
, unsigned long,
74 int, int, int, void *),
77 pid_t pid
= ptid_get_pid (inferior_ptid
);
80 unsigned long start
, end
, size
;
82 int read
, write
, exec
;
84 xasprintf (&mapfilename
, "/proc/%ld/map", (long) pid
);
85 mapfile
= fopen (mapfilename
, "r");
87 error ("Couldn't open %s\n", mapfilename
);
90 fprintf_filtered (gdb_stdout
,
91 "Reading memory regions from %s\n", mapfilename
);
93 /* Now iterate until end-of-file. */
94 while (read_mapping (mapfile
, &start
, &end
, &protection
[0]))
98 read
= (strchr (protection
, 'r') != 0);
99 write
= (strchr (protection
, 'w') != 0);
100 exec
= (strchr (protection
, 'x') != 0);
104 fprintf_filtered (gdb_stdout
,
105 "Save segment, %ld bytes at 0x%s (%c%c%c)\n",
106 size
, paddr_nz (start
),
112 /* Invoke the callback function to create the corefile segment. */
113 func (start
, size
, read
, write
, exec
, obfd
);
121 fbsd_make_corefile_notes (bfd
*obfd
, int *note_size
)
125 char *note_data
= NULL
;
126 Elf_Internal_Ehdr
*i_ehdrp
;
128 /* Put a "FreeBSD" label in the ELF header. */
129 i_ehdrp
= elf_elfheader (obfd
);
130 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_FREEBSD
;
132 fill_gregset (&gregs
, -1);
133 note_data
= elfcore_write_prstatus (obfd
, note_data
, note_size
,
134 ptid_get_pid (inferior_ptid
),
135 stop_signal
, &gregs
);
137 fill_fpregset (&fpregs
, -1);
138 note_data
= elfcore_write_prfpreg (obfd
, note_data
, note_size
,
139 &fpregs
, sizeof (fpregs
));
141 if (get_exec_file (0))
143 char *fname
= strrchr (get_exec_file (0), '/') + 1;
144 char *psargs
= xstrdup (fname
);
146 if (get_inferior_args ())
147 psargs
= reconcat (psargs
, psargs
, " ", get_inferior_args (), NULL
);
149 note_data
= elfcore_write_prpsinfo (obfd
, note_data
, note_size
,
153 make_cleanup (xfree
, note_data
);
159 _initialize_fbsd_proc (void)
161 extern void inftarg_set_find_memory_regions ();
162 extern void inftarg_set_make_corefile_notes ();
164 inftarg_set_find_memory_regions (fbsd_find_memory_regions
);
165 inftarg_set_make_corefile_notes (fbsd_make_corefile_notes
);
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